Forging mechanism



Feb. 7, 1933. A. A. HENTZELL FORGING MECHANISM Filed July 23, 1951 2Sheets-Sheet l mmvron ntzil fr dZIHe wQ/fit H15 A TTORNEY Feb. 7, 1933.A. A. HENTZELL FORGING MECHANISM Filed July 23, 1931 2 Sheets-Sheet 2INVENTOR. Alf ZEIInf H BY 2 H ts A TTORNEY.

Patented Feb. 7, 1933 UNITEDfSTATES PATENT OFFICE,

ALFRED A. HENTZELL, or LIr'rLEroN, conoaano, AssreNoR 'ro INGERSOLL-RANDcom- PANY, or mass? crrx, NEW JERSEY, A coaronarron on NEW JERSEYFORGING MECHANISM This invention relates to forging mecha-' nism, butmore particularly to forming dies for forging mechanism of the type usedfor sharpening working implements, such as drill steels and the like. i

One object of the invention is to enablethe forming dies to be readilyadjusted for the accommodation of drill bits of different sizes.

. Another object is to assure the correct conformation ofthe cuttingbit, and still another object is to simultaneously effect the adjust:ment of the forging dies both for raising and lowering the dies and alsoto adjust the dies laterally with respect to each other.

Other objects will be in part obvious and in part pointed outhereinafter. j

. In the drawings illustrating several forms which the invention mayassume in practice and in which similar reference characters refer tosimilar parts, I

Figure 1 is a sectional elevation of a. pair of co-acting. forming diesconstructed in accordance with the practice of theinvention,

Figure 2 is a lan view of the bottom die assembly taken t rough Figure 1on the ,line 2-2 looking in-the direotionindicated by the arrows, I l; V

Figure 3is an end view of a lowerdie assembly, partly broken away,

Fi ure 4 is a sectional elevationofa modi= fied orm of co-acting formingdies,. I I

Figure 5 is a plan'vie'w ofthe bottom die assembly'taken through Figuretongthe line 5-5 looking in the direction of the arrows, and a V a 1 yFigure 6 is an end view of thebottomdie assembly, shown in Figure 4., a1

Referring more particularly tothe drawings, and at'first to the formofthe invention illustrated in Figures 1 to 3 inclusive, A- desig= natesa stationary die holder which'maybe an integral portion of a drillsharpener or like apparatus used for forging the cutting bits on workingimplements,such as the drill steel designated by B and only the bit endof which is indicated. C represents a die holder disposed above the' dieholder and which may be reciprocable relatively to the die holder A asis customary in mechanism of this type. 'In the adjacent surfaces of thedieholders 1931. Serial No. 552,582.

I A and O are seating surfaces D and E respec-' tively on which areseated co-acting forming die assemblies F and Gr. The die assemblies aresimilar in all their essential respects and are clamped against surfacesH in the ,die holders A and C by plates J seated against the ends of hedie holders and clamped firmly against the die assemblies by means ofbolts K threaded into the die holders.

Each die assembly, constructed in accordance with the practice. of theinvention, comprises a base member L having a plain bottom surface 0which, in the assembled position of the die assembly in the die holder,seats against the seating surfaces, either D or E in the die holders.

In the upper surface of the base member L is a central groove P whichextends longitudinally through the base member and said groove P shouldbe of a width toaccommodate drill bit wings, such as those designated byQ, of the maximum thickness which the die assembly is intended toaccommodate. On the opposite sides of the groove P and in theuppersurface of the base member L are longitudinally extending grooves R andR" which extend through the entire length of the base member and havesurfaces S and T arranged at right angles to each other and preferablyinclined at 45 angles with re spect to the surface O of the member ISeatedin the grooves R and R are blocks Ufand V respectively whichconstitute dies whereby the drill bit wings Q, may be shaped. Theforming dies U and V differ from each other only in that they are ofopposite hand and each die is provided on its lower surface with alongitudinallyv extending projection or rib W shaped to conform to thegrooves R and R". .The ribs W accordingly have angularly arrangedsurfaces X and'Y adapted to seat upon the surfaces S and T of the basemember L. a

The inner or adjacent surfaces Z of each pair of dies are suitablyspaced with respect to each other to form therebetween a slot J-b intowhich metal may flow when the upper die holder O descends upon the work.The upper surfaces 0 of the diesare perpendicular tothe vsurfaces Z andare flat to shape the side surfaces of the wings Q, of the drill bit.Preferably the surfaces 0 constitute the bottom surface of a depressionor recess 03 formed in the contiguous surfaces of opposing pair of dies,and at the inner end of the surface 0 is an inclined surface 6 which mayserve to form the correct angularity of the cutting edge of the bit.

In order to enable the dies U and V to be conveniently adjusted, bothlaterally with respect to each other and to be raised or lowered toassure the proper wing thickness, shims f are disposed between thesurfaces Y of the dies and the surfaces T of the base member L andscrews 9 bearing in the base member L are threaded into the die blocks Uand V to clamp the said die blocks securely in position. The screws 9are arranged in parallelism with respect to the inner seating surfaces Sand may therefore exert a suitable clamping pressure on the die blocksirrespective of the thickness of the shims f which may be placed betweenthe die blocks and the base member.

To the end that the die assemblies may be conveniently held within thedie holders by the mere application of clamping pressure against thebase member L, said base member is provided with a tapered surface h atits rear end to seat against a correspondingly tapered surface j onlateral projections at the rear ends of the die blocks U and V. Theprojection is of the die blocks thus seat against the surfaces H of thedie holders and are pressed thereagainst through the medium of the basemember against the outer end of which is clamped the plate J.

Arranged in the manner described, the die blocks may be readily raisedor lowered and simultaneously adjusted laterally with respect to .eachother to assure the formation of drill bit wings of different thicknessby merely inserting shims f of the proper thickness between the dieblocks and the base member, or by removing a shim or shims to lower thedie blocks with respect to the base member and by so doing to alsospread the die blocks apart in order that drill bits having wings ofgreater width may be formed.

In the modified form of the invention illustrated in Figures 4 to 6inclusive the lower and upper die assemblies designated by 0 and 17respectively are secured on the surfaces D and E of the die holders Aand C by plates 9 clamped to the front ends of the die holders by thescrews K.

E'ach'die assembly 0 and 39 comprises a base member 1" which seats uponthe seating surface D of the die holder and has an upper tapered surfaces which declines from the front end of said base member to support dieblocks 2? and a. The die blocks are provided with tapered surfaces 41 tocorrespond to the taper of the surfaces 8 upon which they seat, and insaid tapered surfaces 4) are formed dove-tail grooves w to accommodatecorrespondingly shaped ribs 00 on the tapered surfaces 8 of the basemembers r.

The grooves w, and therefore the ribs 423', incline with the degree ofinclination of the surfaces 8 and o and also diverge from the high orouter end of the base member 1 and preferably extend throughout thelength of said base member.

The base member 0 is of somewhat shorter length than the seating surfaceupon which it seats, either D or E, so that it may be convenientlyactuated longitudinally of the said seating surfaces. The means providedfor such actuation of the base member r comprises in this instance ascrew g] which is threaded into a threaded aperture 2 in the base memberand is provided with a cylindrical portion 2 journalled in a slot 3 inthe plate g. At the juncture of the cylindrical portion 2 and thethreaded portion of the screw is a collar 4C which seats against theinner face of the plate 9 to prevent endwise movement of the screw in anoutwardly direction with respect to the plate. At the outer end of thescrew y is the usual head 5 which seats against the outer surface of theplate and whereby the screw may be manipulated.

In practice, whenever it is desired to adjust the die blocks, both as toelevation and laterally with respect to each other, it is merelynecessary to reduce the clamping pressure of the plate 9 acting againstthe outer ends of the die blocks and whereby said die blocks are clampedfirmly against the surfaces H of the die holders. The screw g may thenbe rotated, either to draw the base member '7' towards the plate 9 or toadvance it in the direction of the surfaces I-I.

By thus actuating the base member 1 the die blocks may be raised orlowered to suitably space the opposing pairsof dies for assuring theproper wing thickness of the drill bit'and, simultaneously with suchadjustment, the dies of a pair will be "spread or drawn to gether. Afterthe die blocks have been properly adjusted, the screw K may again bemanipulated to clamp the plate 9 firmly against the die blocks. Theentire assembly will then be held in the correct position for longperiods of operation and the relative positions of the parts will remainunaffected y the severity of the jars to which apparatus of thischaracter is generally subjected.

I claim: 1. In forging mechanism, the combination of coac ting dieholders relatively movable toward and from each other'and having seatsin their opposing faces, base members'on the seats, a pair of formingdies on each base member, and means for adjusting the dies on'onebasemember lat'erallyo'fthe dies on another base member and foreffectingrelative lateral adjustment'of the dies of a pair.

2. In forging mechanism, the combination of coacting die holdersrelatively mov-' able toward and from each other and having seats intheir opposing faces, base members on the seats and having guideelements, a pair of forming dies on eachbase member and beinginterlocked with the guide elements, and means for adjusting one pair ofdies laterally of another pair of dies for simultaneously effectinglateral adjustment of the dies of a pair.

3. In forging mechanism, the combination of coacting die holdersrelatively movable toward and from each other and having seats in theiropposing faces, base members on the seats and having guide elements, apair of forming dies on each base member and being interlocked with theguide elements, and means for effecting relative adjustment between thedies of a pair and between each pair of dies and the associated basemember.

4. In forging mechanism, the combination of coating die holdersrelatively movable toward and from each other and having seats in theiropposing faces, base members on the seats, a pair of forming dies oneach base member, and means for adjusting each die in a planeperpendicular to its die holder and to simultaneously adjust the saiddie in a plane paralleling the die holder.

5. In forging mechanism, the combination of coacting die holdersrelatively movable toward and from each other and having seats in theiropposing faces, base members on the seats, forming dies supported by thebase members, and means for adjusting the dies relatively to the basemembers and for simultaneously effecting relative lateral adjustment ofthe dies associated with each base member.

6. In forging mechanism, the combination of coacting die holdersrelatively movable toward and from each other and having seats in theiropposing faces, base members on the seats having grooves therein, pairsof forming dies supported by each base member and being seated in thegrooves, and shims in the grooves to effect adjustment of the dies of apair relatively to each other and relatively to the base member wherebythey are supported.

7. In forging mechanism, the combination of coacting die holdersrelatively movable toward and from each other and having seats in theiropposing faces, base members on the seats having grooves therein, saidgrooves having seating surfaces inclined with respect to each other andwith respect to the seats, forming dies arranged in pairs on each basemember and being seated in the grooves, and shims in the grooves toeffect adjustment of the dies of a pair relatively to each other andrelatively to the base member whereby they are supported. a

8. In forging mechanism, the combination of coacting die holdersrelatively movable toward and from each other and having seats in theiropposing faces, base members on the seats, a pair of forming dies seatedon each base member, and manually operable means for actuating the basemembers to simultaneously adjust the dies of a pair laterally withrespect to each other.

9. In forging mechanism, the combination of co-acting die holdersrelatively movable toward and from each other and having seats in theiropposing faces, base members on the seats having inclined surfaces, apair of forming dies on each base member and having inclined surfacesseating upon the inclined surfaces of the base members, interlockingslidable connections between each base member and the dies of a pair andbeing arranged diagonally with respect to the base members, and meansfor actuating the base members to raise and lower the dies with respectto the seats and for adjusting the dies laterally with respect to eachother.

10. In forging mechanism, the combination of co-acting die holdersrelatively movable toward and from each other and having seats in theiropposing faces, base members on the seats having inclined surfaces,forming dies arranged in pairs on the base members and having diagonalgrooves therein, projections on theinclined surfaces extending into thegrooves and means for actuating the base members longitudinally of thedies to raise and lower the dies with respect to the seats and to adjustthe dies laterally with respect to each other.

11. In forging mechanism, the combination of co-acting die holdersrelatively movable toward and from each other and having seats in theiropposing faces, base members on the seats having forming dies arrangedin pairs on thebase members, said base members and dies havingcooperating inclined surfaces, said dies having diagonal grooves intheir inclined surfaces, diagonal ribs on the base members extendinginto the grooves and being slidably interlocked therewith, means forclamping the dies to the die holders, and screw means acting against thesaid means and being threaded into the base members to actuate the saidbase members longitudinally of the die for elevating and lowering thedies and for simultaneously adjusting the dies laterally with respect toeach other.

In testimony whereof I have signed this specification.

ALFRED A. HENTZELL.

CERTIFICATE OF CORRECTION.

Pateet Ne. 1,396,621 February 7, 1933.

ALFRED A. HENTZELL.

it is hereby certified that error appears in the printed speeifieatien0f the a e rxearreered patent requiring correction as fellows: Page 3,line 9, elairzfl, aner "ees" seeend oeeurrenee insert theword "and"razed line 10., efirer "eifeu ring" msert rhewordrelative;same-page,line 2-3, eiaim 4, for were read "eeaeiing"; and :21e the said Letters Patent sheuld be read with these eorreeiens ham;iL-vnaa :2 time the same may eonferm t0 the record of the case in rheatent fiiiiee. igrreri arid sealed zhis 14th day of March, A. D. 1933.

M. J. Moore,

Acting Commissioner or iatenis.

